BAT42WS
Yangjie Technology
Needs validationhigh risk
A form-fit alternate with matching voltage/current, but higher forward voltage requires careful review for power dissipation.
Best Alternatives to BAT43WS
Finding a substitute for the BAT43WS Schottky diode involves matching its SOD-323 package, 30V reverse voltage, and 200mA forward current. Key considerations for alternatives are forward voltage, reverse recovery time, and capacitance for signal integrity.
AI replacement insight
Electrical riskhigh
Candidates have weaker performance on key parameters like Vf, trr, or Ct.
Package risklow
All considered alternatives use the same SOD-323 package.
Sourcing risklow
Multiple vendors produce similar Schottky diodes in this package.
Can it be replaced directly?
No direct drop-in replacement is confirmed without datasheet review. BAT42WS is parametrically close but has a significantly higher forward voltage, making it a risky choice.
Best replacement path
Parametric alternatives like SD103AWS offer higher stress ratings but require checking performance trade-offs (speed, capacitance).
Main risk
The main risk is electrical performance degradation, specifically higher power dissipation from increased forward voltage or signal issues from slower switching speed and higher capacitance.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | BAT43WS | BAT42WS | SD103AWS | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOD-323 | SOD-323 | SOD-323 | SOD-323 — Form-factor is identical.; SD103AWS: Form-factor is identical. | |
| Voltage | 30V | 30V | 40V | 30V / 40V — Reverse voltage rating matches.; SD103AWS: Higher voltage rating provides more margin. | |
| Current | 200mA | 200mA | 350mA | 200mA / 350mA — Forward current rating matches.; SD103AWS: Higher current rating provides more margin. | |
| Forward Voltage | <0.5V | 1V @ 200mA | - | 1V @ 200mA — Significantly higher Vf increases power loss. | |
| Recovery Time | 5ns | - | 10ns | 10ns — Slower switching speed. | |
| Capacitance | 10pF | - | 50pF | 50pF — Much higher capacitance may affect high-frequency signals. | |
| Temperature | 150°C | - | 125°C | 125°C — Lower max operating temperature. |
Application & sourcing insights
Questions & answers
The best alternative depends on the application's tolerance for parametric shifts. SD103AWS offers higher voltage and current but is slower. BAT42WS matches ratings but has a higher forward voltage. Both require engineering review.